Despite the traditional understanding of Scripture, there were not “ten Lost Tribes.” To start with, there were actually 13 tribes, classed in two groups of twelve depending on your perspective. First, Israel (the man FKA Jacob) had twelve sons: Reuben, Simeon, Levi, Judah, Issachar, Zebulon, Dan, Naphtali, Gad, Asher, Joseph, and Benjamin. Joseph’s two sons Ephraim and Manasseh were counted as the founders of two half-tribes usually listed in place of “Joseph”. However, the land of Canaan (including part of present Jordan) was divided geographically into twelve units given to twelve tribes named after ten of Jacob’s sons (skipping Levi and Joseph) plus Joseph’s two sons. Reuben, Gad, and about half of Manasseh were settled east of the River Jordan in present Jordan; most of the land south of Jerusalem was given to Judah, with Simeon getting a strip at the extreme south, and Benjamin the area just north. Dan originally got the Gaza-Ashkelon coastal strip, but lost it to the Philistines and resettled for the most part in the extreme north. Ephraim and the rest of Manasseh got the middle area, and the other tribes got the north. Levi got specific cities scattered around within the territory of the others, and by and large becane the hereditary scholars and worship leaders. Within Levi, the descendants of Aaron became the Kohanim, the hereditary priests. Much but not all of Levi concentrated in Jerusalem and its surroundings after it was finally conquered and nade the cultic worship center for the united kingdom. Simeon seems to have lost its separate identity and attached itself to Jodah.
So Reuben, Gad, and Simeon were early losses, as the east-of-Jordan area was lost and Simeon assimilated to Judah. When Jeroboam’s revolt succeeded, the central and northern tribes seceded but were never ten in number. Judah and Benjamin, presumably with most of Levi and the remnant of Simeon, remained loyal to the House of David. The tribes which were exiled after the Assyrian conquest of the Northern Kingdom, then, were Ephraim, what was left of Manasseh, Issachar, Zebulon, Dan, Naphtali, Asher, and a part of Levi. And we have small notes here and there suggesting that not everyone was exiled, right down to Anna daughter of Phanuel, of the Tribe of Asher, mentioned in the New Testament Nativity narratives.